Bloody Stars

Under the threat of getting destroyed, Ark(a planet near the asteroid belt) sends a messenger to Earth to ask for help and possibly form an alliance. Ark holds Earth in high regard yet when the Arkian messenger arrives, her whole view of Earth is shattered.

With no way to return to her planet as her ship has been damaged beyond repair, and no way to contact home, she is forced to adapt to whatever Earth throws at her while trying to figure things out.

However, the clock is ticking. Unknown to the Earthlings, the inhabitants of the planet threatening Ark are known to be greedy and will not stop at Ark. Earth will have to enter the fray one way or another.